CPU_IRQ_MAX
#define NR_IRQS (CPU_IRQ_MAX + 1)
#define EIEM_MASK(irq) (1UL<<(CPU_IRQ_MAX - irq))
for (irq = CPU_IRQ_BASE + 1; irq <= CPU_IRQ_MAX; irq++) {
for (i = CPU_IRQ_BASE; i <= CPU_IRQ_MAX; i++) {